研究生: |
曾彥霖 Yan-lin Zeng |
---|---|
論文名稱: |
基於可靠度之引擎吊架最佳化設計 Reliability-Based Optimal Design of Engine Hoists |
指導教授: |
呂森林
Sen-lin Lu |
口試委員: |
廖崇禮
Chung-li Liao 黃聰耀 Cong-yao Huang |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 機械工程系 Department of Mechanical Engineering |
論文出版年: | 2008 |
畢業學年度: | 96 |
語文別: | 中文 |
論文頁數: | 73 |
中文關鍵詞: | 基因演算法 、最佳化 、可靠度設計 |
外文關鍵詞: | genetic algorithms, optimization, reliability design |
相關次數: | 點閱:376 下載:0 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本論文主要目的在設計最佳化的引擎吊架,引擎吊架主要的組成構件包括吊臂桿、吊架主體、油壓缸及兩根輔助桿,設計目標為輕量化引擎吊架的總重量,最佳化設計的設計變數為各管件截面尺寸、支撐點位置及吊架主體的角度等,除此我們也將管件截面尺寸、系統參數及負載重量視為隨機變數,採用可靠度拘束條件進行最佳化設計,文中利用基因演算法來搜尋目標函數的最佳解,搜尋方式不僅使用連續式搜尋法,也使用離散式搜尋法,以材料規格表中給定的尺寸作搜尋,最佳化結果顯示,隨機變數之變異值愈大或可靠度要求值愈高,則最佳設計的總重量就會隨之增加,雖然採用離散式搜尋法所得到的重量會比連續式搜尋法來得重些,但其結果更具實用價值。
This thesis aims at designing an optimal engine hoist which mainly consists of a lifting boom, a body of hoist, a hydraulic jack, and two auxiliary arms. The design object is to minimize the weight of engine hoist. The design variables include the cross-section size of tubes, the position of support, and the supporting angle of body of hoist etc. In addition we regard cross-section size of tubes, system parameters, and loading weight as random variables. Performing the optimization by using the reliability constrained conditions. The genetic algorithm is used to solve the optimal solutions and there are two different ways to search for the answer; continuous search and discrete search. In discrete search, set a particular range for the parameters in the specification of materials and make a search from it. The outcomes of the optimization show that the total weights will increase when the variation and required reliability are high. Although the total weights which by using the discrete search will heavier than by using continuous search, the former one is worth.
【1】S.S. Rao, Reliability Based Design, Mc Graw-Hill, 1992.
【2】K. G. Swift, M. Raines, J. D. Booker, “Case studies in probabilistic design,” Journal of Engineering Design, Vol.11, No.4, pp.299-316, 2000.
【3】Y. T. Tsai, K. S. Wang and S. P. Lo “A study of modularity operation of systems based on maintenance consideration,” Journal of Engineering Design, Vol.14, No.1, pp.41-56, 2003.
【4】L. J. Bain, “Analysis of linear failure rate life testing distributions,” Technometrics, 16, pp.551-560, 1974.
【5】M. L. Shooman, “Probabilistic Reliability: An Engineering Approach,” McGraw-Hill, Inc., 1968.
【6】D. P. Gaver & M. Acar, “Analytical hazard representation for use in reliability, mortality and simulation studies,” Communications in Statistics-Simulation and Computation, B8(2), pp.91-111, 1979.
【7】J. F. Lawless, “Statistical Models and Methods for Lifetime Data,” JOHN WILEY & SONS, Inc., 1982.
【8】L. R. Jaisingh, W. J. Kolarik, and D. K. Dey, “A Flexible Bathtub Hazard Model for Non-repairable Systems with Uncensored Data,” Microelectronic Reliability, Vol.27, No.1, pp.87-103, 1987.
【9】Y. T. Tsai, H. Y. Teng, Y. J. Chen, “Optimizing reliability design for mechanical systems using geometric programming,” Journal of Engineering Design, Published in Vol.16, 2005.
【10】E. Santoro, “Global methods in multi-objective optimization and their application to a mechanical design problem,” Computer in Industry, Vol.18, pp.169-175, 1992.
【11】J.L. Li and J. Wu, “Reliability-based optimal design,” Proceeding of The Fourth ROC Symposium on Reliability and Maintainability, November 23-24, Taipei, Taiwan, pp.109-120, 2001.
【12】Y. T. Tsai, F. S. Hsu, C. L. Shen, “A study of optimizing reliability design using genetic algorithms,” The Chinese Society of Mechanical Engineers, Nov.23-24, 2007.
【13】J. H. Holland, “Addaptation in Natural and Artificial System,” Ann Arbor:The University of Michigan Press, 1975.
【14】L. A. Painton, J. E. Campbell, “Genetic algorithms in optimization of system reliability,” IEEE Transactions on Reliability, Vol.44, No.2 June, pp172-178, 1995.
【15】D. W. Coit, A. E. Smith, “Reliability optimization of series-parallel system using a genetic algorithm,” IEEE Transactions on Reliability, Vol.45, No.2, pp254-266, 1996.
【16】Y. T. Tsai, K. S. Wang and H. Y. Teng, “Optimizing preventive maintenance for mechanical components using genetic algorithms,” Reliability Engineering and System Safety, Vol.74, No.1, pp.89-97, 2001.
【17】D. E. Goldberg, “Genetic Algorithms in Search, Optimization and Machine Learning,” Addison-Wesley Publishing Company, Inc., 1989.
【18】Kececioglu Dimitri, “Reliability of Mechanical Components and Systems,” Nuclear Engineering and Design, Vol.9, pp.259-290, 1972.
【19】J. D. Bagley, “The Behavior of Adaptive Systems which Employ Genetic and Correlation Algorithms,” Dissertation Abstracts International, 28(12), 5106B, 1967.
【20】R. S. Rosenbrg, “Simulation of Genetic Populations with Biochemical Properties,” Dissertation Abstracts International, 28(7) 2732B, 1967.
【21】J. H. Holland, “Hierarcbical Descriptions of Universal Spaces and Adaptive Systems,” Technical Report ORA Projects 01252 and 08226, 1968.
【22】J. M. Gere, Mechanics of materials, Brooks/Cole, 2001.
【23】洪漢君,“以可靠度為基準之皺褶皮的最佳化設計,”國立成功大學造船暨舶機械工程研究所, 碩士論文, 中華民國九十一年六月。
【24】馬鈞文,“主動式車輛懸吊系統之設計使用仿菌式基因演算法,”國立台灣科技大學機械工程系, 碩士論文, 中華民國九十二年七月。
【25】中華民國結構工程學會,“鋼結構設計手冊(容許應力法),”研究報告CSSE86-05A, 中華民國八十六年八月。